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Motorcycle tyre. A motorcycle tyre (spelt tire in American English) is the outer part of motorcycle wheel, attached to the rim, providing traction, resisting wear, absorbing surface irregularities, and allowing the motorcycle to turn via countersteering. The two tyres' contact patches are the motorcycle's connection to the ground, and so are ...
The motorcycles used are frequently custom-created combinations of off-road motorcycles and road-racing wheels/tires, known as 'supermotard' bikes. Riders also wear a combination of road race and offroad equipment, normally road racing leathers and motocross helmets and boots. Unlike normal motorcycle racing, the emphasis lies on slower speeds ...
Motorcycle helmet. A motorcycle helmet is a type of helmet used by motorcycle riders. Motorcycle helmets contribute to motorcycle safety by protecting the rider's head in the event of an impact. They reduce the risk of head injury by 69% and the risk of death by 42%. Their use is required by law in many countries.
For example, a motorcycle with a 12 inch wide rear tire will have t = 6 inches. If the combined bike and rider center of mass is at a height of 26 inches, then a 25° lean must be increased by 7.28°: a nearly 30% increase. If the tires are only 6 inches wide, then the lean angle increase is only 3.16°, just under half.
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Sales of motorcycles and scooters declined 43.2% in 2009, and continued to decrease in the first quarter of 2010, with scooter sales doing worst, down 13.3% compared to a 4.6% drop for all two-wheelers. [46] Other types of small motorcycles include the minibike, monkey bike, Welbike, pocketbike, and pit bike .
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